Billed as the world's fastest tire, the new Vittoria Corsa Speed G Plus Tubular Tire boasts revolutionary graphene technology for an unprecedented mix of low rolling resistance, durability, and all-weather grip. The Corsa Speed G Plus is the culmination of a collaboration between Vittoria and carbon manufacturer Directa Plus to create a carbon compound known as graphene, which is then incorporated into the tire. Vittoria's calling the result G plus, and it claims that G Plus' inclusion significantly reduces rolling resistance while maintaining the durability Vittoria has long been known for. Clocking in at a claimed 45g lighter than the standard Corsa G Plus, the Corsa Speed G Plus has all the makings of a purebred racer. Available 700 x 23 black / dark gray sidewall